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iwlwifi: trans: allow skipping scheduler hardware config

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In a later patch, the hardware configuration will be moved to
firmware. Prepare for this by allowing hardware configuration
in the transport to be skipped by not passing a configuration
on enable and passing configure_scd=false on disable.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg 2014-08-01 12:17:40 +02:00 committed by Emmanuel Grumbach
parent 0ade579cce
commit d4578ea810
7 changed files with 103 additions and 64 deletions
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6
drivers/net/wireless/iwlwifi/dvm/tx.c
View File

@ -580,7 +580,7 @@ turn_off:
* time, or we hadn't time to drain the AC queues.
*/
if (agg_state == IWL_AGG_ON)
iwl_trans_txq_disable(priv->trans, txq_id);
iwl_trans_txq_disable(priv->trans, txq_id, true);
else
IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
agg_state);
@ -686,7 +686,7 @@ int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
* time, or we hadn't time to drain the AC queues.
*/
if (agg_state == IWL_AGG_ON)
iwl_trans_txq_disable(priv->trans, txq_id);
iwl_trans_txq_disable(priv->trans, txq_id, true);
else
IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
agg_state);
@ -781,7 +781,7 @@ static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
"Can continue DELBA flow ssn = next_recl = %d\n",
tid_data->next_reclaimed);
iwl_trans_txq_disable(priv->trans,
tid_data->agg.txq_id);
tid_data->agg.txq_id, true);
iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
tid_data->agg.state = IWL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);

47
drivers/net/wireless/iwlwifi/iwl-trans.h
View File

@ -444,7 +444,9 @@ struct iwl_trans_txq_scd_cfg {
* Must be atomic
* @txq_enable: setup a queue. To setup an AC queue, use the
* iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
* this one. The op_mode must not configure the HCMD queue. May sleep.
* this one. The op_mode must not configure the HCMD queue. The scheduler
* configuration may be %NULL, in which case the hardware will not be
* configured. May sleep.
* @txq_disable: de-configure a Tx queue to send AMPDUs
* Must be atomic
* @wait_tx_queue_empty: wait until tx queues are empty. May sleep.
@ -501,7 +503,8 @@ struct iwl_trans_ops {
void (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
const struct iwl_trans_txq_scd_cfg *cfg);
void (*txq_disable)(struct iwl_trans *trans, int queue);
void (*txq_disable)(struct iwl_trans *trans, int queue,
bool configure_scd);
int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm);
@ -773,9 +776,22 @@ static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
trans->ops->reclaim(trans, queue, ssn, skbs);
}
static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
bool configure_scd)
{
trans->ops->txq_disable(trans, queue);
trans->ops->txq_disable(trans, queue, configure_scd);
}
static inline void
iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
const struct iwl_trans_txq_scd_cfg *cfg)
{
might_sleep();
if (unlikely((trans->state != IWL_TRANS_FW_ALIVE)))
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
trans->ops->txq_enable(trans, queue, ssn, cfg);
}
static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
@ -789,19 +805,26 @@ static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
.frame_limit = frame_limit,
};
might_sleep();
if (unlikely((trans->state != IWL_TRANS_FW_ALIVE)))
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
trans->ops->txq_enable(trans, queue, ssn, &cfg);
iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg);
}
static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue,
int fifo)
{
iwl_trans_txq_enable(trans, queue, fifo, -1,
IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0);
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = fifo,
.sta_id = -1,
.tid = IWL_MAX_TID_COUNT,
.frame_limit = IWL_FRAME_LIMIT,
};
iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg);
}
static inline void
iwl_trans_txq_enable_no_scd(struct iwl_trans *trans, int queue, u16 ssn)
{
iwl_trans_txq_enable_cfg(trans, queue, ssn, NULL);
}
static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans,

8
drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
View File

@ -452,14 +452,16 @@ void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
switch (vif->type) {
case NL80211_IFTYPE_P2P_DEVICE:
iwl_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE);
iwl_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE,
true);
break;
case NL80211_IFTYPE_AP:
iwl_trans_txq_disable(mvm->trans, vif->cab_queue);
iwl_trans_txq_disable(mvm->trans, vif->cab_queue, true);
/* fall through */
default:
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
iwl_trans_txq_disable(mvm->trans, vif->hw_queue[ac]);
iwl_trans_txq_disable(mvm->trans, vif->hw_queue[ac],
true);
}
}

4
drivers/net/wireless/iwlwifi/mvm/sta.c
View File

@ -910,7 +910,7 @@ int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
}
tid_data->ssn = 0xffff;
iwl_trans_txq_disable(mvm->trans, txq_id);
iwl_trans_txq_disable(mvm->trans, txq_id, true);
/* fall through */
case IWL_AGG_STARTING:
case IWL_EMPTYING_HW_QUEUE_ADDBA:
@ -965,7 +965,7 @@ int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
iwl_trans_txq_disable(mvm->trans, tid_data->txq_id, true);
}
mvm->queue_to_mac80211[tid_data->txq_id] =

2
drivers/net/wireless/iwlwifi/mvm/tx.c
View File

@ -482,7 +482,7 @@ static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
IWL_DEBUG_TX_QUEUES(mvm,
"Can continue DELBA flow ssn = next_recl = %d\n",
tid_data->next_reclaimed);
iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
iwl_trans_txq_disable(mvm->trans, tid_data->txq_id, true);
tid_data->state = IWL_AGG_OFF;
/*
* we can't hold the mutex - but since we are after a sequence

3
drivers/net/wireless/iwlwifi/pcie/internal.h
View File

@ -366,7 +366,8 @@ int iwl_pcie_tx_stop(struct iwl_trans *trans);
void iwl_pcie_tx_free(struct iwl_trans *trans);
void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int queue, u16 ssn,
const struct iwl_trans_txq_scd_cfg *cfg);
void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue);
void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue,
bool configure_scd);
int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
struct iwl_device_cmd *dev_cmd, int txq_id);
void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans);

97
drivers/net/wireless/iwlwifi/pcie/tx.c
View File

@ -1070,37 +1070,41 @@ void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, u16 ssn,
const struct iwl_trans_txq_scd_cfg *cfg)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u8 frame_limit = cfg->frame_limit;
int fifo = -1;
if (test_and_set_bit(txq_id, trans_pcie->queue_used))
WARN_ONCE(1, "queue %d already used - expect issues", txq_id);
/* Stop this Tx queue before configuring it */
iwl_scd_txq_set_inactive(trans, txq_id);
if (cfg) {
fifo = cfg->fifo;
/* Set this queue as a chain-building queue unless it is CMD queue */
if (txq_id != trans_pcie->cmd_queue)
iwl_scd_txq_set_chain(trans, txq_id);
/* Stop this Tx queue before configuring it */
iwl_scd_txq_set_inactive(trans, txq_id);
/* If this queue is mapped to a certain station: it is an AGG queue */
if (cfg->sta_id >= 0) {
u16 ra_tid = BUILD_RAxTID(cfg->sta_id, cfg->tid);
/* Set this queue as a chain-building queue unless it is CMD */
if (txq_id != trans_pcie->cmd_queue)
iwl_scd_txq_set_chain(trans, txq_id);
/* Map receiver-address / traffic-ID to this queue */
iwl_pcie_txq_set_ratid_map(trans, ra_tid, txq_id);
/* If this queue is mapped to a certain station: it is an AGG */
if (cfg->sta_id >= 0) {
u16 ra_tid = BUILD_RAxTID(cfg->sta_id, cfg->tid);
/* enable aggregations for the queue */
iwl_scd_txq_enable_agg(trans, txq_id);
trans_pcie->txq[txq_id].ampdu = true;
} else {
/*
* disable aggregations for the queue, this will also make the
* ra_tid mapping configuration irrelevant since it is now a
* non-AGG queue.
*/
iwl_scd_txq_disable_agg(trans, txq_id);
/* Map receiver-address / traffic-ID to this queue */
iwl_pcie_txq_set_ratid_map(trans, ra_tid, txq_id);
ssn = trans_pcie->txq[txq_id].q.read_ptr;
/* enable aggregations for the queue */
iwl_scd_txq_enable_agg(trans, txq_id);
trans_pcie->txq[txq_id].ampdu = true;
} else {
/*
* disable aggregations for the queue, this will also
* make the ra_tid mapping configuration irrelevant
* since it is now a non-AGG queue.
*/
iwl_scd_txq_disable_agg(trans, txq_id);
ssn = trans_pcie->txq[txq_id].q.read_ptr;
}
}
/* Place first TFD at index corresponding to start sequence number.
@ -1108,32 +1112,39 @@ void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, u16 ssn,
trans_pcie->txq[txq_id].q.read_ptr = (ssn & 0xff);
trans_pcie->txq[txq_id].q.write_ptr = (ssn & 0xff);
iwl_write_direct32(trans, HBUS_TARG_WRPTR,
(ssn & 0xff) | (txq_id << 8));
iwl_write_prph(trans, SCD_QUEUE_RDPTR(txq_id), ssn);
if (cfg) {
u8 frame_limit = cfg->frame_limit;
/* Set up Tx window size and frame limit for this queue */
iwl_trans_write_mem32(trans, trans_pcie->scd_base_addr +
SCD_CONTEXT_QUEUE_OFFSET(txq_id), 0);
iwl_trans_write_mem32(trans, trans_pcie->scd_base_addr +
iwl_write_direct32(trans, HBUS_TARG_WRPTR,
(ssn & 0xff) | (txq_id << 8));
iwl_write_prph(trans, SCD_QUEUE_RDPTR(txq_id), ssn);
/* Set up Tx window size and frame limit for this queue */
iwl_trans_write_mem32(trans, trans_pcie->scd_base_addr +
SCD_CONTEXT_QUEUE_OFFSET(txq_id), 0);
iwl_trans_write_mem32(trans,
trans_pcie->scd_base_addr +
SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
((frame_limit << SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) &
SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
((frame_limit << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
/* Set up status area in SRAM, map to Tx DMA/FIFO, activate */
iwl_write_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id),
(1 << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
(cfg->fifo << SCD_QUEUE_STTS_REG_POS_TXF) |
(1 << SCD_QUEUE_STTS_REG_POS_WSL) |
SCD_QUEUE_STTS_REG_MSK);
}
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
iwl_write_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id),
(1 << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
(cfg->fifo << SCD_QUEUE_STTS_REG_POS_TXF) |
(1 << SCD_QUEUE_STTS_REG_POS_WSL) |
SCD_QUEUE_STTS_REG_MSK);
trans_pcie->txq[txq_id].active = true;
IWL_DEBUG_TX_QUEUES(trans, "Activate queue %d on FIFO %d WrPtr: %d\n",
txq_id, cfg->fifo, ssn & 0xff);
txq_id, fifo, ssn & 0xff);
}
void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id)
void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id,
bool configure_scd)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u32 stts_addr = trans_pcie->scd_base_addr +
@ -1152,10 +1163,12 @@ void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id)
return;
}
iwl_scd_txq_set_inactive(trans, txq_id);
if (configure_scd) {
iwl_scd_txq_set_inactive(trans, txq_id);
iwl_trans_write_mem(trans, stts_addr, (void *)zero_val,
ARRAY_SIZE(zero_val));
iwl_trans_write_mem(trans, stts_addr, (void *)zero_val,
ARRAY_SIZE(zero_val));
}
iwl_pcie_txq_unmap(trans, txq_id);
trans_pcie->txq[txq_id].ampdu = false;